A wealthy person being told he owes money to the government, or to the poor? It could even be someone who won the lottery (the way attractive people won the genetic lottery). But then is taxing lottery winners analogous to forcing women into sex? There's another implication here as well, in that if taxation isn't theft then forced promiscuity doesn't seem to be rape. In retrospect, a most unpleasant analogy that thankfully breaks down under a more nuanced view of property (wish I had more time to refine this comment).